61666012232 has 32 divisors (see below), whose sum is σ = 128272917600. Its totient is φ = 27554918400.

The previous prime is 61666012181. The next prime is 61666012259. The reversal of 61666012232 is 23221066616.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61666012192 and 61666012201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5933369 + ... + 5943752.

It is an arithmetic number, because the mean of its divisors is an integer number (4008528675).

Almost surely, 2^61666012232 is an apocalyptic number.

It is an amenable number.

61666012232 is an abundant number, since it is smaller than the sum of its proper divisors (66606905368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61666012232 is a wasteful number, since it uses less digits than its factorization.

61666012232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11877197 (or 11877193 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 61666012232 its reverse (23221066616), we get a palindrome (84887078848).

The spelling of 61666012232 in words is "sixty-one billion, six hundred sixty-six million, twelve thousand, two hundred thirty-two".